<template>
  <div class="com-container">
    <div class="com-chart" ref="stock_ref"></div>
  </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
  computed: {
    ...mapState(['theme'])
  },
  watch: {
    theme () {
      console.log('主题切换了')
      this.chartInstance.dispose()
      this.initChart()
      this.screenAdapter()
      this.updateChart()
    }
  },
  data() {
    return {
      chartInstance: null,
      allData: null,
      // 当前显示的数据
      currentIndex: 0,
      // 定时器标识
      timerId: null,
    };
  },
  created() {
    this.$socket.registerCallBack('stockData', this.getData)
  },
  mounted() {
    this.initChart();
    // this.getData();
    this.$socket.send({
      action: 'getData',
      socketType: 'stockData',
      chartName: 'stock',
      value: ''
    })
    window.addEventListener("resize", this.screenAdapter);
    this.screenAdapter();
  },
  destroyed() {
    window.removeEventListener("resize", this.screenAdapter);
    clearInterval(this.timerId)
    this.$socket.unRegisterCallBack('stockData')
  },
  methods: {
    initChart() {
      this.chartInstance = this.$echarts.init(this.$refs.stock_ref, "chalk");
      const initOption = {
        title: {
          text: "┃ 库存和销量分析",
          left: 20,
          top: 20,
        },
      };
      this.chartInstance.setOption(initOption);
      this.chartInstance.on('mouseover', () => {
          clearInterval(this.timerId)
      })
      this.chartInstance.on('mouseout', () => {
          this.startInterval()
      })
    },
    getData(res) {
      // 获取数据
      // const { data: res } = await this.$http.get("stock");
      this.allData = res;
      this.updateChart();
      this.startInterval();
    },
    updateChart() {
      const centerArr = [
        ["18%", "40%"],
        ["50%", "40%"],
        ["82%", "40%"],
        ["34%", "75%"],
        ["66%", "75%"],
      ];
      const colorArr = [
        ["#4ff778", "#0ba82c"],
        ["#e5dd45", "#e8b11c"],
        ["#e8821c", "#e55445"],
        ["#5052ee", "#ab6ee5"],
        ["#23e5e5", "#2e72bf"],
      ];
      // 处理图表需要的数据
      const start = this.currentIndex * 5;
      const end = (this.currentIndex + 1) * 5;
      const showData = this.allData.slice(start, end);
      const seriesArr = showData.map((item, index) => {
        return {
          type: "pie",
          center: centerArr[index],
          labelLine: {
            show: false,
          },
          label: {
            position: "center",
            color: colorArr[index][0],
          },
          data: [
            {
              value: item.sales,
              name: item.name + "\n\n" + item.sales,
              itemStyle: {
                color: new this.$echarts.graphic.LinearGradient(0, 1, 0, 0, [
                  {
                    offset: 0,
                    color: colorArr[index][0],
                  },
                  {
                    offset: 1,
                    color: colorArr[index][1],
                  },
                ]),
              },
            },
            {
              value: item.stock,
              itemStyle: {
                color: "#333843",
              },
            },
          ],
          hoverAnimation: false,
        };
      });
      const dataOption = {
        series: seriesArr,
      };
      this.chartInstance.setOption(dataOption);
    },
    screenAdapter() {
      const titleFontSize = this.$refs.stock_ref.offsetWidth / 100 * 3.6
      const innerRadius = titleFontSize * 2.8
      const outterRadius = innerRadius * 1.125
      const adapterOption = {
          title:{
              textStyle:{
                  fontSize: titleFontSize
              }
          },
          series:[
              {
                  type: 'pie',
                  radius: [outterRadius, innerRadius],
                  label: {
                      fontSize: titleFontSize / 2
                  }
              },
              {
                  type: 'pie',
                  radius: [outterRadius, innerRadius],
                  label: {
                      fontSize: titleFontSize / 2
                  }
              },
              {
                  type: 'pie',
                  radius: [outterRadius, innerRadius],
                  label: {
                      fontSize: titleFontSize / 2
                  }
              },
              {
                  type: 'pie',
                  radius: [outterRadius, innerRadius],
                  label: {
                      fontSize: titleFontSize / 2
                  }
              },
              {
                  type: 'pie',
                  radius: [outterRadius, innerRadius],
                  label: {
                      fontSize: titleFontSize / 2
                  }
              }
          ]
      };
      this.chartInstance.setOption(adapterOption);
      this.chartInstance.resize();
    },
    startInterval() {
      if (this.timerId) {
        clearInterval(this.timerId);
      }
      this.timerId = setInterval(() => {
        this.currentIndex++;
        if (this.currentIndex > 1) {
          this.currentIndex = 0;
        }
        // 在更改完currentIndex之后，需要更新界面
        this.updateChart();
      }, 5000);
    },
  },
};
</script>

<style>
</style>